/* * asn1_internal.h * --------------- * Library internal header file for ASN.1 routines. These functions * are not part of the public libhal API. * * The only reason for not collapsing this header file into * hal_internal.h is to maintain some isolation between the few * modules which use libtfm and the rest of the library. * * More than 20 years after it was written, the best simple * introduction to ASN.1 is still Burt Kalski's "A Layman's Guide to a * Subset of ASN.1, BER, and DER". Ask your nearest search engine. * * Authors: Rob Austein * Copyright (c) 2015, NORDUnet A/S * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _HAL_ASN1_INTERNAL_H_ #define _HAL_ASN1_INTERNAL_H_ #include #include #define ASN1_UNIVERSAL 0x00 #define ASN1_APPLICATION 0x40 #define ASN1_CONTEXT_SPECIFIC 0x80 #define ASN1_PRIVATE 0xC0 #define ASN1_PRIMITIVE 0x00 #define ASN1_CONSTRUCTED 0x20 #define ASN1_TAG_MASK 0x1F #define ASN1_INTEGER (ASN1_PRIMITIVE | 0x02) #define ASN1_BIT_STRING (ASN1_PRIMITIVE | 0x03) #define ASN1_OCTET_STRING (ASN1_PRIMITIVE | 0x04) #define ASN1_NULL (ASN1_PRIMITIVE | 0x05) #define ASN1_OBJECT_IDENTIFIER (ASN1_PRIMITIVE | 0x06) #define ASN1_SEQUENCE (ASN1_CONSTRUCTED | 0x10) #define ASN1_SET (ASN1_CONSTRUCTED | 0x11) #define ASN1_EXPLICIT_CONTEXT (ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED) #define ASN1_EXPLICIT_0 (ASN1_EXPLICIT_CONTEXT + 0) #define ASN1_EXPLICIT_1 (ASN1_EXPLICIT_CONTEXT + 1) /* * Functions to strip const qualifiers from arguments to libtfm calls * in a relatively type-safe manner. These don't really have anything * to do with ASN.1 per se, but all the code that needs them reads * this header file, so this is the simplest place to put them. */ static inline fp_int *unconst_fp_int(const fp_int * const arg) { return (fp_int *) arg; } static inline uint8_t *unconst_uint8_t(const uint8_t * const arg) { return (uint8_t *) arg; } /* * OIDs. */ extern const uint8_t hal_asn1_oid_rsaEncryption[]; extern const size_t hal_asn1_oid_rsaEncryption_len; extern const uint8_t hal_asn1_oid_ecPublicKey[]; extern const size_t hal_asn1_oid_ecPublicKey_len; extern const uint8_t hal_asn1_oid_aesKeyWrap[]; extern const size_t hal_asn1_oid_aesKeyWrap_len; extern const uint8_t hal_asn1_oid_mts_hashsig[]; extern const size_t hal_asn1_oid_mts_hashsig_len; /* * Transcoding functions. */ extern hal_error_t hal_asn1_encode_header(const uint8_t tag, const size_t value_len, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_header(const uint8_t tag, const uint8_t * const der, size_t der_max, size_t *hlen, size_t *vlen); extern hal_error_t hal_asn1_encode_integer(const fp_int * const bn, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_encode_uint32(const uint32_t n, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_encode_octet_string(const uint8_t * const data, const size_t data_len, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_integer(fp_int *bn, const uint8_t * const der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_uint32(uint32_t *np, const uint8_t * const der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_octet_string(uint8_t *data, const size_t data_len, const uint8_t * const der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_encode_spki(const uint8_t * const alg_oid, const size_t alg_oid_len, const uint8_t * const curve_oid, const size_t curve_oid_len, const uint8_t * const pubkey, const size_t pubkey_len, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_spki(const uint8_t **alg_oid, size_t *alg_oid_len, const uint8_t **curve_oid, size_t *curve_oid_len, const uint8_t **pubkey, size_t *pubkey_len, const uint8_t *const der, const size_t der_len); extern hal_error_t hal_asn1_encode_pkcs8_privatekeyinfo(const uint8_t * const alg_oid, const size_t alg_oid_len, const uint8_t * const curve_oid, const size_t curve_oid_len, const uint8_t * const privkey, const size_t privkey_len, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_pkcs8_privatekeyinfo(const uint8_t **alg_oid, size_t *alg_oid_len, const uint8_t **curve_oid, size_t *curve_oid_len, const uint8_t **privkey, size_t *privkey_len, const uint8_t *const der, const size_t der_len); extern hal_error_t hal_asn1_encode_pkcs8_encryptedprivatekeyinfo(const uint8_t * const alg_oid, const size_t alg_oid_len, const uint8_t * const data, const size_t data_len, uint8_t *der, size_t *der_len, const size_t der_max); extern hal_error_t hal_asn1_decode_pkcs8_encryptedprivatekeyinfo(const uint8_t **alg_oid, size_t *alg_oid_len, const uint8_t **data, size_t *data_len, const uint8_t *const der, const size_t der_len); extern hal_error_t hal_asn1_guess_key_type(hal_key_type_t *type, hal_curve_name_t *curve, const uint8_t *const der, const size_t der_len); /* * Peek ahead for an OPTIONAL attribute. */ static inline int hal_asn1_peek(const uint8_t tag, const uint8_t * const der, size_t der_max) { return der != NULL && der_max > 0 && der[0] == tag; } #endif /* _HAL_ASN1_INTERNAL_H_ */ /* * Local variables: * indent-tabs-mode: nil * End: */ f='#n155'>155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668